The number Ï is a mathematical constant, the ratio of a circle 's circumference to its diameter, commonly approximated as 3.14159. It has been represented by the Greek letter  Ï  since the mid-18th century, though it is also sometimes spelled out as  pi  (/paÉª/). Being an irrational number, Ï cannot be expressed exactly as a fraction (equivalently, its decimal representation never ends and never settles into a permanent repeating pattern).
Paris, France is also known under the nicknames: The City of Lights The City of Love = The City od Love and Lights It is called these names because of the view from the eiffi â¦ el tower which is so romantic and you can see a view of everything that is lite at night while overlooking the eiffiel tower.
The other treaties with the Central Powers were also signed in and around Paris - the Treaty of Trianon with Hungary, the Treaty of Sevres with the Ottoman Empire, and the Treaty of Saint Germain with Austria. The peace conference to end the First World War was held in and around Paris and was known as the Paris Peace Conference. Technically the war itself did not end until the signing of the Treaty of Versailles with Germany in 1919. (Versailles is a former royal palace near Paris).